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On 19/07/16 21:51, M. J. Everitt wrote:
On 19/07/16 21:38, Gordon Henderson wrote:
On Tue, 19 Jul 2016, Tom wrote:
I was really considering this for a
teaching exercise - with all this RaspberryPi and micro:bit
etc going on as an ex microchip designer I'd like to help
teach IT and electronics. It looks like there is a
bootstrapping possibility here - OK solder doesn't smell right
anymore but you can probably go from RaspberryPi and a small
bath of etchant to a full blown PCB production on a
bootstrapped cnc plotter/cutter.
You can still buy an use leaded solder. It's the flux that's the
real nasty if using it on a daily basis. You just can't use
leaded solder in commercial projects and I guess the safety elfs
have banned it with children too, when there's really no need.
(lead vapour temp. is way below a normal soldering iron)
The learning process would result in
seriously useful tangible things! Ragworm are Â40 (+pp) for a
one off that should be around Â3 or Â4 if you have a
school/club with a reasonable stock order of PCB blanks,
Who needs PBCs...
http://make.kosakalab.com/arduino/obaka/project-7/index_en.html
Gordon
Breadboard would be a good option too, and cheap. Just get a bunch
of 'Du-Pont' wires to bridge between R-Pi and peripherals, and be
VERY CAREFUL not to let anything more than 3v3 near the Pi pins or
you will torch the processor!!
A better bet for interfacing, might be to go down the Arduino
route, as the chip has protection diodes, and the IDE is quite
straightforward too. Depends what height you're pitching at I
suppose..
MJE
The link keeps timing out on this will try later...
Tom te tom te tom
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